We had an awful first night’s sleep on this mattress (bought the medium one, but it seems much harder than in store). The delivery men constructed the bed, how can I check they put it the right way up - which label are you referring to (none on the top)?
The label referred to is the label on the side of the mattress. This will be stitched into the edge. Providing the label is the correct way up, the mattress will also be.